Electric bell.



A. JAGOBSEN.

ELECTRIC BELL. APPLICATION PILEBD JUNE 2, 1913.

1,079,649, Patented Nov. 25, 1913.

5; v 3 ill Illli 10 "T Z6 5 v T H 3 f a muumn w um 9 ANDREW JACOBSEN, OF IERUITVALE, CALIFORNIA ELECTRIC BELL.

Specification of Letters Patent.

Application filed June 2, 1913.

Patented Nov. 25, 1913. Serial No. 771,278.

To aZZ whom it may concern:

Be it known that I, ANDREW JAOOBSEN, a citizen of the United States, residing at Fruitvale, in the county of Alameda and State of California, have invented certain new and useful Improvements in Electric Bells; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention comprehends improvements in electric bells and relates more particularly to those in which a pivoted armature is actuated by electro-magnets so as to cause a bell to be sounded.

The primary object of the invention resides in the provision of a bell of this type which shall be of extremely simple construction, cheap to manufacture, and capable of being easily maintained in proper working order.

Another and more specific object of the invention lies in the provision of an automatic bell including a standard having an arm on which are supported a pair of electro-magnets, an armature pivoted intermediate its ends to the standard and carrying a striker for engagement with the bell proper, and spring means for returning the armature to its normal position so as to close the circuit.

Vith these and other objects in view, as will become more apparent as the description proceeds, the invention consists in certain novel features of construction, combination, and arrangement of parts, as will be hereinafter described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawings in which,

Figure 1 is a rear elevation of my improved electric bell, the wiring being somewhat diagrannnatically shown, and Fig. 2 is a top plan view with the bell shown in section.

In the preferred embodiment of my invention, I provide a base 5 having a stand-.

ard 6 formed with the laterally extending arms 7 and 8. These members are preferably cast integrally but may be otherwise constructed if desired.

A pair of electro-magnets9 are supported in any suitable manner upon the arm 7 and have their cores l0 positioned directly under an armature 11 which is pivoted upon a shaft 12 extending laterally from near the upper extremity of the standard 6. This shaft is insulated from the standard by the sleeve 13 and the armature is further protected from electrical contact with the standard 6 by means of the insulation 14. The armature is pivoted upon the shaft 12 centrally of its ends and has extending from one extremity a striker 15, which fits within an opening formed in the enlargement 16 and which is secured therein by means of a set screw 17. An insulating sleeve 17 surrounds the shank of the striker 15 and holds the same from contact with the armature. A contractile spiral spring 18 is secured at one end to the other extremity of the armature and connects the same with an upstanding arm 19 formed upon the base 5. The rod 20 which connects the spring 18 to the arm 19, carries a nut which is threaded upon the rod, and provides means for increasing or decreasing the tension of the spring.

A. spring arm 23 is secured to the top of the armature and is adapted to contact with a stop 24 which extends through and which is insulated from a projection 25 formed upon the arm 8. A bell 26 is secured to the shaft 12 by means of a screw 27 and is formed with a wedge-shaped projection 28 which extends directly under the striker 15.

Any suit-able circuit through the bell may be employed, such, for instance, as having the current flow from the coils 9 to the binding post 29, through the arm 19 and spring 1.8 to the armature, and from the spring arm 23 to the stop pin 24. The bell may be connected with any suitable source of current, such as the battery 31 by means of the wires 33 and 34, which lead to the coils 9 and t0 the stop pin 24, respectively.

When the circuit is closed by means of the push button 32, the armature will be attracted by the electro-magnets, causing the striker to contact with the projection 28 and sound the bell. The movement of the striker into contact with the projection 28 moves the spring arm 23 from engagement with the stop 24 and the circuit remains open until the spring 18 returns the armature to its normal position, at which time the arm 23 is in contact with the stop 24.

From the foregoing description taken in connection with the accompanying drawings,

it will be seen that I have provided a Very cheaply and simply constructed electric bell in which the parts are easily accessible and capable of adjustment.

It is to be understood that While I have shown and described the preferred embodi-' ment of my invention, I do not Wish to be limited to this exact construction, combina tion, and arrangement of parts, but may make such changes as Will fall Within the spirit and scope of the invention.

Having thus described my invention, What I claim is 2- trally of its ends upon the shaft and insulated from the standard, a bell, a striker extending from one extremity of the armature for engagement with the bell said striker being insulated from the armature, a stop carried upon the other arm, a spring contact movable With the armature for normal engagement with the stop, and spring means for returning the armature to its normal position after having been attracted by the electro-magnet said spring means, armature and stop being in the bell circuit.

In testimony whereof I aflix my signature in presence of two Witnesses.

ANDREW J AOOBSEN.

WVit-nesses:

F. F. JAooBsnN, E. E. BICKELL.

Copies of this patent may 'be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

